Perfect bike that will fit: Flying Horse Bullet Train Electric Start Engine

[KCvale]

And with a street legal 50cc grubee your not going that fast anyway.

Speak for yourself ;-}
Everything I build will cruise 30mph, some much faster.
Get enough brake for your bikes speed, weight and the terrain, you'll thank me some day ;-}

Disc brakes are great, try to start with a bike that comes with them.

Just jackshaft the drive to the right.